20-03-2014 дата публикации
Номер: US20140081607A1
A method of modeling phase characteristics of thermodynamic systems utilizing pseudo-properties strategy and a reduced number of variables is disclosed herein. The method describes a means of determining the probability of phase splitting of mixtures of materials at a given temperature, pressure, and composition by characterizing the functions that describe the system via pseudo-properties, and also by describing the system in n−1 or fewer variables, where n represents the number of components in the system of interest. In an embodiment, a multi-component system is characterized in one variable, thereby providing simplified thermodynamic models in a time-efficient manner. In addition, the information generated by this reduced-variable calculation can further be used as a starting point for calculations of equations of state. 1. A system , comprising:a computer system;a memory; {'o': [{'@ostyle': 'single', 'z'}, {'@ostyle': 'single', 'x'}], 'sub': 1', '2', 'n', '1', '2', 'n, 'a thermodynamic equilibrium application, stored in the memory, that, when executed by the computer system, estimates whether a material mixture at a specified temperature, a specified pressure, and having a specified feed composition substantially in a first state comprised of n components having a mole fraction {z, z, . . . , z} is likely to be split into at least two phases based on evaluating a tangent hyperplane distance function in a variable ={x, x, . . . , x} representing the mole fraction of the material mixture in a second state by reducing the order of the tangent hyperplane distance function by substituting α comprised of from 1 variable to n−1 variables,'}, 'a thermodynamic process simulation application, stored in the memory; and'}wherein the thermodynamic process simulation application executes on the computer system and invokes the thermodynamic equilibrium application to determine a result based on the probability that the material mixture is split into at least two phases ...
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